Preheat oven to 180C

Line a 23 x 13 cm loaf tin with baking paper

In a medium bowl, mash the bananas

Stir in the sugar

Add the mayonnaise, flour and a pinch of sea salt and lightly mix, just until combined

Using a spatula, scrape the mixture into the tin and bake until a skewer inserted into the center comes out clean, 45 minutes

Let cool in the pan for 10 minutes, then turn onto a rack

Enjoy it warm straight away or lightly grilled